The colored groups are attractive. I see a lot of vintage, from a range of manufactures as Chad noted. I can't say offhand that I see any that are newer. So that's good.
I think the common wisdom would be to shy away from selling by color. But what you have here are common marbles so I'm not sure how much money they would make. With that in mind, it's possible that selling in colored lots is as good a plan as any. With creative presentation and good photos, they could surprise.